Process of insulating wire.



0. T. HUNGERFORD.

PROCESS OF INSULATING WIRE.

APPLICATION FILED AUG. 17. 1901.

LM'KHMU Patented Oct. 26, 1915.

\ Swuentoz Q/Vihwooeo J IIIT OLIVER T. HUNGERFORD, OF BELLEVILLE, NEW JERSEY.

PROCESS OF INSULATING WIRE.

Application filed August 17, 1907.

To all whom it may concern Be it known that I, OLIVER T. HUNGER- FORD, a citizen of' the United States, residing at Belleville, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Processes of Insulating Wire, of which the following is a specification. v

My said invention consists in an improved method of saturating the covering for electric conductors with an insulating compound, by which said covering is filled with such compound evenly and uniformly on all its sides and from end to end of the conductor,v whereby a comparatively perfect and efiicient insulating electric conductor is provided, all as will be hereinafter more fully described and claimed.

In the accompanying drawings I have illustrated an apparatus for the carrying out of my process, most of the parts of which are old and well known,embodying only such changes as are necessary to adaptthe same for my improved process.

In said drawings the portions marked A represent the tank for containing the insulating compound, B a vacuum chamber in which the operation is performed, and C a reel.

The tank A is of any suitable construction and is provided with a steam coil (1 on its interior for keeping the insulating compound contained therein hot and in a liquid condition.

The chamber B is of suitable form and construction for the purpose and is adapted to be sealed by a cover B held in place by the hinged clamping bolts 7) in a well known manner. It is also provided with a steam coil 1) by means of which the insulating compound therein may be kept hot and in a liquid condition.

The steam coils a and b are connected by branches at and 6 respectively to a large pipe or jacket A extending between the tanks A and B. A small pipe a extends from tank A to tank B through said pipe A, through which the insulating material may flow from one to the other. A valve 0 is provided in said pipe a by which the flow of said insulating material may be controlled. Supports b are provided in the tank or chamber B adapted to support the reel B In one side of said chamber B is Specification of Letters Patent.

Patented Get. 26, I915.

Serial No. 389,069.

formed a perforation in which is mounted a die 6 the perforation through the die being'just the size which it is desired to form the conductor.

In operation the reel B containing the wire with the covering, preferably of matted felt surrounded by a woven fabric covering, is placed in the supports 6 within the chamber B, the trunnions b of said reel resting in the bearings if provided therefor in the top of said supports, as shown. The end of the conductor is projected through the die 6 Said chamber is then sealed by clamping the cover B firmly in position. The air is then exhausted from chamber B by means of a pump attached to the nipple B in one side of said chamber. After the air and all moisture has been exhausted from said chamber the valve of is opened and the hot insulating compound is allowed to flow from tank A into said chamber B until the reel B and the strand of the conductor projecting through the die 6 is completely submerged. Valve a is then closed and air pressure is then applied by means of an air pump through the nipple B until sufficient pressure in chamber B is secured to force said compound through the covering of the wire and completely fill and saturate it. The projecting end of said conductor is then drawn through the die 5- and attached to the reel C. The crank 0 of said reel is then turned until the conductor is unwound from. reel B on the inside of chamber B andiwound upon reel C on the outside of said chamber. Said conductor is thus subjected from the point where it leaves reel 13 to the die 6 to the full force of the pressure in chamber B upon all its sides and as it is dr'awn'through die 6 the surplus material is stripped from its sides with the result that a perfectly formed and uniformly .saturated insulation is secured, the conductors being removed from the insulating chamber in single strands and while under the full pressure. The valve. a being opened, the insulating compound is forced back into tank A, the cover B opened, the reel B removed, another reel of covered wire put in its place and the operation repeated.

Having thus fully described my said in-' vention, what I claim as new an desire to secure by Letters Patent, is-

The method of applying insulating compound to fabric covered Wires Which conmy hand and seal at Beileville, New Jersey, sists in deposlting such Wire in a chamber this fifth day of August, A. D. nineteen containing the insulating compound under hundred and seven.

pressure and drawing said Wire through a OLIVER T. HUNGERFORD. [L-S.] 5 die from said chamber and through said Vitnesses:

compound, substantially as set forth. E. C. SALING, In Witness whereof, I, have hereunto set F. B. NORRIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington. D. C. 

